how to make certain parameters optional in python code example

Example 1: python optional parameters

def my_func(a = 1, b = 2, c = 3):
	print(a + b + c)
    
my_func()
#OUTPUT = 6

my_func(2)
#This changes the value of a to 2
#OUTPUT = 7

my_func(c = 2)
#This changes the value of c to 2
#OUTPUT = 5

Example 2: optional argument python

def myfunc(a,b, *args, **kwargs):
      c = kwargs.get('c', None)
      d = kwargs.get('d', None)
      #etc
myfunc(a,b, c='nick', d='dog', ...)